SEECAL computes specific effective energies (SEE) for any of 54 source regions and 32 target regions in the human body and for ages from newborn to adult male and adult female and for any of 838 radionuclides in the ICRP Publication 38 collection or 242 radionuclides in the Medical Internal Radiation Dose Committee (MIRD) collection. Reference individuals are newborn, 1-year-old, 5-year-old, 10-year-old, 15-year-old, 70-kg adult male and 58-kg adult female. Sources and targets from the new ICRP respiratory tract model (ICRP Publication 66, 1994) are included in Version 2.0 of SEECAL. Computation of specific effective energies is a first step in radiation dose and risk calculations.

The present version does not address the radiations emitted in spontaneous fission. SEECAL can handle up to:
- 30 nuclides and
- 6000 radiations (for all nuclides combined).
If one of these numbers is exceeded, SEECAL will write an error message to the LOG file and stop execution.

The package consist of database and computational programs, with some input selected form menus. The menuing and other user-interface routines were written in Microsoft BASIC Professional Development System (Ver.7.1) or Microsoft C (Ver.6) and all computational programs were written in Microsoft FORTRAN (Ver.5.1).
Programs fragments gathered in file READ_SEE.FOR are written in Fortran 88.